Fix broken tests. Start to refactor the tests a little.
Add more tests

 - Add test coverage for pending specs includeing fixtures.
 - Add API endpoint Constant in spec_helper
Remove some whitespace.
Use api_url method instead of API_ROOT constant
Make api_url helper to accept path
Add stup_api helper method to simplify api stubbing
Add stub_api default options
Merge branch 'master' into adding-test-coverage
Add method aliases for customer, transactions and payment methods